---
title: "IC 2171"
url: "https://spacecatalog.org/object/ic-2171"
release: "DR1"
licence: "CC-BY-SA-4.0"
citation: "SpaceCatalog. IC 2171 [catalogue entry]. Data release DR1 (2026-08-21). https://spacecatalog.org/object/ic-2171"
---

# IC 2171

IC 2171 is an irregular [galaxy](https://spacecatalog.org/galaxies) IB in the constellation [Canis Major](https://spacecatalog.org/constellation/canis-major), shining at apparent magnitude 15.19 (B). Other catalogues list it as 2MASX J06442732-1755568, 2MASX J06442769-1755566 and ESO 557-12, among 8 designations in total.

## At a glance

- **WHAT IT IS:** Irregular galaxy
- **HOW BIG ON THE SKY:** 1.6′ — Small enough that the full Moon would cover it several times over.
- **HOW BRIGHT (B):** 15.19 — Faint: it takes a large telescope.
- **WHERE TO LOOK:** [Canis Major](https://spacecatalog.org/constellation/canis-major) — The patch of sky it sits in, as seen from Earth.

## Properties

| Quantity | Value |
| --- | --- |
| CLASS | Irregular galaxy IB |
| APPARENT MAGNITUDE (B) | 15.19 |
| CONSTELLATION | Canis Major |
| RIGHT ASCENSION (J2000) | 06h 44m 27.7s |
| DECLINATION (J2000) | −17° 55′ 56.9″ |

## Catalogue data

### WHAT KIND OF THING IT IS

What the object is in itself, rather than how it happens to look from here.

| Field | Value |
| --- | --- |
| Hubble type | IB |

### HOW BRIGHT IT IS

What the light adds up to, measured through one filter at a time. A magnitude is a brightness on a backwards scale — the smaller the number, the brighter the object.

| Field | Value |
| --- | --- |
| Apparent magnitude (B) | 15.19 |
| Surface brightness | 23.58 mag/arcsec² |

### WHERE IT IS AND HOW IT MOVES

Position, motion across the sky and the size it covers on it. These are measurements of the object as seen from here, so every one of them depends on where here is.

| Field | Value |
| --- | --- |
| Major axis | 1.63′ |
| Minor axis | 0.34′ |
| Position angle | 91° |

### OTHER NAMES AND NUMBERS

The identifiers other catalogues file this object under, for anyone joining this data to theirs.

| Field | Value |
| --- | --- |
| OpenNGC type code | G |
| Wikidata item | Q3692050 |

## Also known as

- 2MASX: 2MASX J06442732-1755568
- 2MASX: 2MASX J06442769-1755566
- ESO: ESO 557-12
- IC: IC 2171
- IRAS: IRAS 06422-1752
- LEDA: LEDA 19526
- MCG: MCG -03-18-001
- PGC: PGC 19526

## Source

[OpenNGC](https://github.com/mattiaverga/OpenNGC) — CC-BY-SA-4.0

The producer asks: OpenNGC, Mattia Verga (github.com/mattiaverga/OpenNGC). Fields derived from it stay under CC BY-SA 4.0.

How this was made: https://spacecatalog.org/methods#source-openngc

## Cite this page

SpaceCatalog. IC 2171 \[catalogue entry\]. Data release DR1 (2026-08-21). https://spacecatalog.org/object/ic-2171

```bibtex
@misc{spacecatalog_ic-2171,
  author       = {{SpaceCatalog}},
  title        = {{IC 2171}},
  howpublished = {SpaceCatalog, data release DR1 (2026-08-21)},
  year         = {2026},
  url          = {https://spacecatalog.org/object/ic-2171},
  note         = {Catalogue entry, data release DR1 (2026-08-21). Values from OpenNGC.}
}
```

OpenNGC — CC-BY-SA-4.0

Acknowledgement the producer asks for: OpenNGC, Mattia Verga (github.com/mattiaverga/OpenNGC). Fields derived from it stay under CC BY-SA 4.0.

The page itself, with its pictures, the sky map and the observing tools: https://spacecatalog.org/object/ic-2171